Alphabetic Index FY2027

D00.0

Carcinoma in situ of lip, oral cavity and pharynx

FY2027Chapter 2: Neoplasms/D00–D09 In situ neoplasms

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

D00.0 is a non-billable ICD-10-CM code header for carcinoma in situ of lip, oral cavity and pharynx. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are D00.00 Carcinoma in situ of oral cavity, unspecified site; D00.01 Carcinoma in situ of labial mucosa and vermilion border; D00.02 Carcinoma in situ of buccal mucosa; D00.03 Carcinoma in situ of gingiva and edentulous alveolar ridge and 5 more. Its coding notes include a Use additional code instruction and 5 Excludes1 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • exposure to tobacco smoke in the perinatal period (P96.81)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • carcinoma in situ of aryepiglottic fold or interarytenoid fold, laryngeal aspect (D02.0)
  • carcinoma in situ of epiglottis NOS (D02.0)
  • carcinoma in situ of epiglottis suprahyoid portion (D02.0)
  • carcinoma in situ of skin of lip (D03.0, D04.0)
Inherited from D00 Carcinoma in situ of oral cavity, esophagus and stomach

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (4 notes)
Inherited from D00–D09 In situ neoplasms
  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia

Notes

Also from chapter/block level (8 notes)
Inherited from Chapter 2 Neoplasms
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

More specific codes under D00.0 9